<template>
  <div class="login-container" :style="{ 'background-image': 'url(' + getbgUrl(dict.label.sys_info.bgImage) + ')','background-repeat':'no-repeat','background-size':'cover' }">
    <div class="login-middle">
      <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">
        <div class="title-container">
          <h3 class="title">{{ dict.label.sys_info.sysName || '逍遥域开放平台' }}</h3>
        </div>

        <el-form-item prop="username">
          <span class="svg-container">
            <svg-icon icon-class="user" />
          </span>
          <el-input
            ref="username"
            v-model="loginForm.username"
            placeholder="请输入用户名"
            name="username"
            type="text"
            tabindex="1"
            auto-complete="on"
          />
        </el-form-item>

        <el-form-item prop="password">
          <span class="svg-container">
            <svg-icon icon-class="password" />
          </span>
          <el-input
            :key="passwordType"
            ref="password"
            v-model="loginForm.password"
            :type="passwordType"
            placeholder="请输入密码"
            name="password"
            tabindex="2"
            auto-complete="on"
            @keyup.enter.native="handleLogin"
          />
          <span class="show-pwd" @click="showPwd">
            <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
          </span>
        </el-form-item>

        <el-form-item prop="imageCode">
          <el-col :span="18">
            <span class="svg-container">
              <svg-icon icon-class="search" />
            </span>
            <el-input
              ref="imageCode"
              v-model="loginForm.imageCode"
              placeholder="请输入验证码"
              name="imageCode"
              type="text"
              tabindex="1"
              @keyup.enter.native="handleLogin"
            />
          </el-col>
          <el-col :span="6">
            <el-image style="vertical-align: middle; padding-top: 6px" :src="imageCodeUrl" alt="验证码" title="点击更换验证码" fit="fill" @click="changeCodeImage()">
              <div slot="error" class="el-image__error" title="点击重新加载" @click="changeCodeImage()">
                验证码加载失败
              </div>
              <div slot="placeholder" class="el-image__error">
                验证码加载中...
              </div>
            </el-image>
          </el-col>
        </el-form-item>

        <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">登&nbsp;&nbsp;&nbsp;录</el-button>

        <div class="tips">
          <!-- <span style="margin-right:20px;">username: username </span>
          <span> password: any</span>-->
        </div>

      </el-form>
    </div>
    <div class="support">
      <h5>© CopyRight 2020-{{ year }} &nbsp;{{ dict.label.sys_info.CopyRight || 'https://www.ikkjb.com 逍遥域开放平台' }}</h5>
      <h5 style="text-align: center; color: #eee;">版本信息:
        <span style="margin-left: 5px">
          int-{{ dict.label.sys_info.interface_version || 'V1.0.0' }} &nbsp;
          web-{{ dict.label.sys_info.web_version || 'V1.0.0' }}
        </span>
      </h5>
    </div>
  </div>

</template>

<script>
import { validUsername } from '@/utils/validate'
import { getVerifyImage, verifyImageURL } from '@/api/open/verifyCode'
import store from '@/store'
export default {
  name: 'Login',
  dicts: [
    'sys_info'
  ],
  data() {
    const validateUsername = (rule, value, callback) => {
      if (!validUsername(value)) {
        callback(new Error('请输入用户名!'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (value.length < 5) {
        callback(new Error('密码长度不够长！'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        username: '', //
        password: '', //
        imageCode: '',
        deviceId: ''
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePassword }]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined,
      imageCodeUrl: verifyImageURL + store.getters.deviceId + '&t=' + new Date().getTime(),
      bgImgs: { bg1: require('@/assets/image/bg1.jpg'),
        bg2: require('@/assets/image/bg2.jpg'),
        bg3: require('@/assets/image/bg3.jpg'),
        bg4: require('@/assets/image/bg4.jpg'),
        bg5: require('@/assets/image/bg5.jpg')

      },
      year: new Date().getFullYear()
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }

  },
  mounted() {
    // this.changeCodeImage()
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('user/login', this.loginForm).then(() => {
            this.$router.push({ path: this.redirect || '/' })
            this.loading = false
          }).catch(() => {
            this.loading = false
            this.changeCodeImage()
            this.loginForm.imageCode = ''
          })
        } else {
          console.log('error submit!!')
          return false
        }
      })
    },
    // 刷新验证码
    changeCodeImage() {
      /* const t = Date.parse(new Date())
      // 下面这种形式，容易造成重复请求
      this.imageCodeUrl = verifyImageURL + 'dadfadfa&t=' + t*/
      getVerifyImage().then(res => {
        const blob = new Blob([res])
        const url = window.URL.createObjectURL(blob)
        this.imageCodeUrl = url
      }).catch(error => {
        console.log(error)
      })
    },
    // 获取背景图片
    getbgUrl(bgUrl) {
      if (bgUrl) {
        const exp = /(http|https):\/\/([\w.]+\/?)\S*/
        if (new RegExp(exp).test(bgUrl)) {
          return bgUrl
        } else {
          if (bgUrl.indexOf('.') > 0) {
            bgUrl = bgUrl.substring(0, bgUrl.indexOf('.'))
          }
          const bgImg = this.bgImgs[bgUrl]
          // console.log(bgImg)
          return bgImg
        }
      } else {
        return this.bgImgs.bg2
      }
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg:#283443;
$light_gray:#fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;
$bgImgUrl: '../../assets/image/bg1.jpg';
.login-container {
  // position: relative;
  // background-image:url(var(bgImgUrl));
  height: 100%;
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;
  .login-middle{
    position: relative;
    height: 73vh;
  }
  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 16px 35px 0;
    margin: 18vh auto;
    border: 1px  ;
    overflow: hidden;
    background-color: rgba(26, 26, 26, 0.4);
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }

  .support{
    position: relative;
    text-align: center;
    color: $light_gray;
    margin-bottom: 2px;
    // border: 1px solid;
  }
}
</style>
